When you purchase Saxenda from Simple Online Pharmacy, you'll receive the weight loss injection pen.
You can purchase needle heads to use with these pens here:
https://www.simpleonlinepharmacy.co.uk/medications/saxenda-needles/
You can also purchase a sharps bin to dispose of used needle heads here: https://www.simpleonlinepharmacy.co.uk/medications/1-litre-sharps-bin/